Ventilator.



W. J. LINDBMEYER.

VENTILATOR. APPLICATION rum in. 1a. 1910.

Patented Dec. 13,1910.

2 SHEETS-SHEET 2.

VIIIIIIIIIII- \I I-IIIIIIIIII- WITNESSES ATTORNEYS;

UNITED STAIESPA'IENT OFFICE.

WILLIAM J. LINDEMEYER, OF STAPLETON, NEW YORK.

VENTILATOR.

Specification of Letters Patent.

Patented Dec. 13, 1910.

Application filed April 18, 1910. Serial No. 556,065. TO a RELQUU,ED

To all whom it may concern:

Be it known that I, TILLIAM J. LINDE- MEYER,'A citizen of the United States, and residing at Stapleton, Staten Island, in the county of Richmond and State of New York, have invented certain new and useful Improvements in Ventilators, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to devices or apparatus for ventilating buildings of various kinds and classes, and the object thereof is to provide an improved device of this class which is simple in construction, practical and etlieient in operation, and which may be applied wherever devices of this class are required.

The invention consists of a suitable flue or tube in which is placed a transverse sup port above which is a spring supported hood and means for lowering said hood and securing it in any desired position for adj ustment so as to control the passage of air through the fine or tube, and particularly of the details of construction hereinafter described and claimed and by which said hood is supported and may be adjusted into different position.

The invention is fully disclosed in the following specification, of which the accompanying drawing forms a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which Figure l is a sectional side view of my improved ventilating device; Fig. 2 a view similar to Fig. 1, but at right angles thereto; Fig. 3 a View similar to Fig. 2 but showing a modification; Fig. 4 a side view of a tool or implement used in adjusting the hood of the ventilator and the use of which is indicated in dotted lines in Fig. 1; Fig. 5 a view similar to Fig. 1 showing another modification, and;-Fig. (3 a view similar to Fig. 2 of the construction shown in Fig. 5.

In the drawing forming a part of this specification I have shown at a a ventilating tube or fine which may be placed at any point in the roof of a building and which may be either round or square in cross section or oblong in cross section as indicated in Fig. 3.

In the practice of my invention as shown in Figs. 1 and 2 I secure in the top portion of the tube or flue a a cross member or support I) having a central vertically arranged guide 6 through which is passed a vertically movable shaft 0, with the top of which is connected a hood cl which is preferably conical in cross section, and to the under side and central portion of which is secured, in the construction shown, a concavo-convex disk (Z through which the shaft 0 passes. The shaft 0 is preferably made angular in cross section and the central bore of the guide 2) through which the said shaft passes is correspondingly formed so as to prevent the rotation of said shaft in said guide. Placed between the hood (I and the guide I) is a spiral spring a which normally holds said hood in its highest position and this spring is preferably made in the form of a cone, the apex of which extends downwardly and rests upon the guide 6. end of the shaft 0 is provided in the form of construction shown with a head 0 having an aperture 0 and the guide 6 which is arranged vertically is provided at its opposite sides with laterally directed pins or stops 6, and in practice I also provide a yokeshaped lock device 6, the side arms of which are parallel at their lower ends and connected by an offset cross head (2 above which is placed a transverse pin 6 and the upper end portions of the side arms of the yokeshaped device 0 diverge in this form of construction as shown at c and are pivoted to the hood (Z at e. The head 0 at the lower end of the shaft 0 and the pin 0 in the lower end portion of the yoke-shaped device a are connected by a spring 7 and the parallel lower end portions of the side arms of the yoke-shaped device 0 are provided with teeth 0 which are adapted to engage the stop pins 6 and hold the hood (Z in any desired position of adjustment.

It will be understood that devices of this class are usually placed in such position overhead that an implement of some kind is necessary in order to operate the hood cl or lower it, and for this purpose I provide a tool or implement 9 shown in Fig. 4 and in dotted lines in Fig. 1, and said tool or implement comprises a suitable handle 9 having a head 9 at one side of which is a hook g and at the opposite side of which is a nose piece 9".

\Vhenever it is desired to lower the hood cl 'of the ventilator the tool or implement q is The lower the shaft 0, and at this time a pull on the tool or implement 9 will draw down the shaft 0 and in this Operation the teeth 6 on the side arms of the yoke-shaped device pass over the stop pins 79 under the control f the pr nsf a will be ead y nderstood, and when the hood (Z has been drawn down to the desired point of adjustment the teeth 6 operating in connection with the stop pins 6 will hold saidlhood in said position. Whenever it is desired to raise the hood (6 tlletool or implement g ismanipulated so as to pass the hooky through the aperture 0 in the head 0 ofthe shaft 0, after which said tool or implement is manipulated so as to force the nose githereof against the head 6 of the yokeeshaped device 6 and force the lowerend of saiddevice outwardly as shown in dotted lines in Fig. 1, so that the teeth 6 willbe disengaged from the stops or pins b ,at which time the springs will raise said hood and when the said hood has .been raised to the desired point the tool or implement g is manipulated so as to allow the spring 7 to operate. In this way the hood (Z, .as will be understood, may be adjusted into any desired position and the flow of air through the flue or conduit a may thus e r gu ated.

In Fig. 3 I have shown a modification in which the tube or conduit a is enlarged so as to increase the dimensions thereof, and in this form of construction in order to steady the :hood (Z which is correspondingly enlarged I employ a plurality of suitably spaced transverse supports 6, shafts c and springs a vthe lower ends of the shafts 0 being provided only with stops, heads or collars It which limit the upward movement of said shafts, and in connection with these parts I employ a central support 5 through which is passed a shaft 0, together with the yoke-shaped attachment 6, said parts being similar in all respects to those shown in Figs. 1 and 2 and with this form of construction the hood (Z is normally held in its highest position by the springs a, and in order to lower said hood, the tool 9 is manipulated in connection with the head 0 of the central shaft 0, so as to pull down said hood, and said tool is manipulated in con nection with the head 0 of the shaft 0, and the head 6 of the yoke-shaped attachment 6, so as .to disconnect the teeth 6 on the side arms of said attachment from the stop pins 5 in order that the springs a may raise the hood, it being understood that the spring f is also employed in connection with the yoke-shaped attachment 6, and the head 0 of the shaft 0 in the construction shown in Fig. 3, and as indicated in dotted lines in said figure, the same as with the construction shown in Figs. 1 and 2.

In the construction shown in Fig. 3 the side arms of the yoke-shaped attachment 6 are made parallel throughout their length and .0 spring a is employed. in connection with said attachment and the corresponding support 6, as two of the springs 64 will be sufficient under most conditions, but it willbe understood that a spring a may be employed in connection with the central keeper 1), the corresponding shaft 0 and yoke-shaped device 6 if desired, and other changes in and modifications of the construction hereinafter described may be made within the scope of the appended claims, without departing from the spirit of my invention, or sacrificing its advantages.

Inthe construction shown in Figs. 1 and 2 the concavo-convex disk (Z is provided with a depending flange or rim 2' within which the spring (6 fits and which serves to hold the larger end of said spring in proper position, while in the construction shown in Fig. 3stops 2' are secured to the hood (Z for a similar purpose, said stops serving inconnection with the angle at 2' in the hood (Z formed by the depending flange or rim of said hood.

In Figs. 5 and 6 I have shown another modification in which the support Z), the ver tical movable shaft 0, the springaflthe hood (Z and the locking device 6 are all employed together with the spring f, all of these parts being of the same form and construction as in Figs. 1 and 2 with the exception that the spring a is inverted, the base portion thereof resting on the support I) and the apex thereof inclosing a tubular member secured centrally to one side of the hood d. The tubular member 7' serves to hold the spring a in proper position and in this form of construction the sides of the yokeshaped locking device 6 are parallel throughout and are passed up through the spring a and are pivoted to the tubular member 7' as shown at 7' and the operation of the construction shown in Figs. 5 and 6 will be the same as of that shown in Figs. 1 and 2.

Although I have described the construc tion shown in Figs. 5 and 6 as a modification, this form of a device may be preferred in some cases and especially where the tube, fine or casing 54 is small.

In all the forms of construction the spring a is conical in form, this shape of said spring being preferred in order that the separate coils thereof when the spring is compressed will fold one within another and enable the hood (Z to be drawn down close to the top of the tube, flue or casing a when the support I) is located at or near the top thereof, but my invention is not limited to this shape or form of said spring.

Having fully described my invention what I claim as new, and desire to secure by Letters Patent, is

1. In a ventilating device of the class descr bed, a flue, tube or casmg, a transverse support mounted in the top portion thereof and provided with a central vertically arranged keeper, a shaft mounted in and vertically movable in said keeper, a hood connected with the upper end of said shaft, a locking device pivotally suspended from said hood and provided with teeth adapted to engage stops on the sides of said keeper, a tension device connecting the lower end of said shaft and the lower end of said yokeshaped attachment and tension means for holding said hood in an elevated position.

2. A ventilating device of the class described, comprising a tube, flue or casing in which is placed a transverse support provided with a central vertical guide, a vertically movable shaft passing through said guide, a hood connected with the upper end of said shaft, a spring placed between said hood and said support and normally SGI'V- ing to hold said hood in its highest position, a yoke-shaped locking device pivotally suspended from said hood and the side arms of which are provided with ratchet teeth adapted to engage stops connected with said keeper, and a tension device connecting the lower end of said shaft and the lower end portion of said yoke-shaped locking device.

3. A ventilating device of the class described, comprising a tube, flue or casing, a transverse support adapted to be secured therein and provided with a central vertically arranged keeper, a shaft vertically movable through said keeper, a hood con; nected with the upper end'of said shaft, a spring placed between said hood and said keeper, a lock device pivotally suspended from said hood and provided with teeth adapted to engage stops on said keeper and a tension device connecting the lower end of said shaft with said lock device.

l. In a ventilating device of the class described, a transverse support adapted to be secured in a tube, flue or casing and provided with a central vertically arranged keeper, a shaft movable vertically through said keeper, a hood connected with the upper end of said shaft, a depending locking device connected with said hood and adapted to be engaged by said keeper at different points and means for connecting the lower end of said locking device with the lower end of said shaft.

In testimony that I claim the foregoing as my invention I have signed my name in presence of the subscribing witnesses this 16th day of April 1910.

WILLIAM J. LINDEMEYER.

WVitnesses C. E'. MULREANY, B. M. Emerson. 

